Abstract
HEPATIC tyrosine transaminase activity in untreated rats1 or mice2 given free access to dietary protein3 and exposed to alternate periods of light and darkness4 undergoes four-fold variations during each 24 h period. Much of the amino-acid intake is metabolized by deamination5 and we have sought to determine whether the rate of transformation of injected tyrosine in the mouse varies with time of day.
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References
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ROSE, C., WURTMAN, R. Daily Rhythms in Content and Utilization of Tyrosine in the Whole Mouse. Nature 226, 454–455 (1970). https://doi.org/10.1038/226454a0
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DOI: https://doi.org/10.1038/226454a0
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